/* ============================================================
   Blockchain + Universities Forum — Second Edition
   Design system: near-black luminance-stepped surfaces,
   Inter + JetBrains Mono, FBA palette as functional accents.
   ============================================================ */

:root{
  --black:#000000;
  --canvas:#0a0a0a;
  --card:#141414;
  --elev:#1e1e1e;
  --border:#313131;
  --smoke:#454545;
  --mist:#7c7c7c;
  --ash:#a7a7a7;
  --bone:#ffffff;

  /* FBA brand — elements & accents only */
  --accent:#42A4D2;      /* cyan  — keynotes, links, functional marks */
  --deep:#3253AE;        /* deep blue — glows, washes                 */
  --teal:#34B597;        /* teal  — Work Tables                       */
  --violet:#8F7BF8;      /* violet — panels                           */

  --font-sans:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --maxw:1200px;
  --pad:24px;
  --r-md:4px;
  --r-lg:8px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--canvas);
  color:var(--bone);
  font:400 16px/1.5 var(--font-sans);
  letter-spacing:-0.25px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.mono{font-family:var(--font-mono);letter-spacing:.085em}
.container{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}

::selection{background:rgba(66,164,210,.35)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}

.skip{position:fixed;top:-48px;left:16px;z-index:200;background:var(--bone);color:var(--canvas);
  padding:8px 14px;border-radius:var(--r-lg);font-weight:500;transition:top .2s}
.skip:focus{top:12px}

.section,.cta-band,#hero{scroll-margin-top:64px}

/* ---------- type ---------- */
h1{font-size:clamp(38px,5.1vw,64px);line-height:1.12;font-weight:500;letter-spacing:-0.034em;margin:0 0 20px}
h2{font-size:clamp(28px,3.4vw,40px);line-height:1.2;font-weight:500;letter-spacing:-0.021em;margin:0 0 16px}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.085em;text-transform:uppercase;
  color:var(--ash);margin:0 0 22px}
.section-sub{color:var(--ash);max-width:640px;margin:0 0 40px}
.link{color:var(--accent)}
.link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:500 14px/1 var(--font-sans);letter-spacing:-0.1px;
  border-radius:var(--r-lg);padding:12px 20px;border:1px solid transparent;
  cursor:pointer;transition:background .18s,border-color .18s,color .18s,transform .18s;white-space:nowrap}
.btn-primary{background:var(--bone);color:var(--canvas)}
.btn-primary:hover{background:#e6e6e6}
.btn-ghost{background:transparent;border-color:var(--smoke);color:var(--bone)}
.btn-ghost:hover{border-color:var(--mist)}
.btn-sm{padding:9px 16px}
.btn-lg{padding:14px 26px;font-size:15px}

/* ---------- nav ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(10,10,10,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color .25s}
.nav.is-scrolled{border-bottom-color:var(--elev)}
.nav-in{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--bone)}
.brandmark{height:30px;width:auto;display:block;flex:0 0 auto}
.brandmark .bm-body path{fill:var(--bone)}
.brandmark .bm-spark path{fill:var(--accent)}
.brand-name{font:600 13px/1.25 var(--font-sans);letter-spacing:-.15px;white-space:nowrap}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{font:500 14px/1 var(--font-sans);color:var(--bone);padding:9px 14px;border-radius:9999px;
  transition:background .18s,color .18s}
.nav-links a:hover{background:var(--elev)}
.nav-cta{display:flex;align-items:center;gap:12px}

.lang{display:flex;border:1px solid var(--border);border-radius:9999px;padding:2px}
.lang-btn{font:500 12px/1 var(--font-mono);letter-spacing:.06em;color:var(--ash);
  background:transparent;border:0;border-radius:9999px;padding:6px 10px;cursor:pointer;transition:.18s}
.lang-btn.is-active{background:var(--bone);color:var(--canvas)}
.lang-btn:not(.is-active):hover{color:var(--bone)}

.menu-btn{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;
  background:transparent;border:1px solid var(--border);border-radius:var(--r-lg);cursor:pointer;padding:0 9px}
.menu-btn span{display:block;height:1.5px;background:var(--bone);transition:transform .25s,opacity .25s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(3.25px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){transform:translateY(-3.25px) rotate(-45deg)}

.mobile-menu{position:fixed;inset:64px 0 0 0;z-index:90;background:var(--canvas);
  padding:32px var(--pad);overflow:auto}
.mobile-menu nav{display:flex;flex-direction:column;gap:4px;max-width:var(--maxw);margin-inline:auto}
.mobile-menu a{font:500 24px/1.3 var(--font-sans);letter-spacing:-0.02em;padding:14px 4px;
  border-bottom:1px solid var(--elev)}
.mobile-menu a.btn{border-bottom:0;margin-top:24px;align-self:flex-start;font-size:15px}

/* ---------- blueprint grid background ---------- */
.gridbg{position:relative}
.gridbg::before{content:'';position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--elev) 1px,transparent 1px),
    linear-gradient(90deg,var(--elev) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.5;
  -webkit-mask-image:radial-gradient(ellipse 85% 75% at 50% 32%,#000 25%,transparent 78%);
  mask-image:radial-gradient(ellipse 85% 75% at 50% 32%,#000 25%,transparent 78%)}

/* ---------- hero ---------- */
.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:120px 0 72px;overflow:hidden}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;
  align-items:center;gap:56px;width:100%}
.hero-copy .eyebrow{color:var(--accent)}
.hero-sub{color:var(--ash);max-width:480px;margin:0 0 32px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero-meta{font-size:12px;color:var(--mist);line-height:2}

.iso-wrap{position:relative;justify-self:center;width:clamp(280px,34vw,440px);perspective:950px}
.iso-wrap::before{content:'';position:absolute;inset:-18%;
  background:radial-gradient(closest-side,rgba(50,83,174,.34),rgba(50,83,174,0) 72%);pointer-events:none}
.iso-stage{transform-style:preserve-3d;will-change:transform}
.iso{position:relative;width:100%;height:auto;display:block}
html.js .iso-wrap{animation:lm-in 1.1s cubic-bezier(.22,.8,.3,1)}
html.js .iso-stage{animation:lm-sway 15s ease-in-out infinite}
.lm-metal{opacity:0}
html.js .lm-metal{animation:lm-phase 16s ease-in-out infinite}
@keyframes lm-in{from{opacity:0;transform:translateY(26px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes lm-sway{0%,100%{transform:rotateY(-14deg) rotateX(3.5deg)}50%{transform:rotateY(13deg) rotateX(-3deg)}}
@keyframes lm-phase{0%,30%{opacity:0}47%,53%{opacity:.9}70%,100%{opacity:0}}

.scroll-cue{position:relative;z-index:1;align-self:center;margin-top:40px;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:11px;color:var(--mist)}
.scroll-cue i{width:1px;height:44px;background:linear-gradient(var(--smoke),transparent);
  display:block;animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%,100%{transform:scaleY(1);opacity:.9}50%{transform:scaleY(.55);opacity:.4}}

/* ---------- sections ---------- */
.section{padding:112px 0}
.cols-2{display:grid;grid-template-columns:1fr 1fr;gap:40px;max-width:1000px}
.cols-2 p{margin:0;color:var(--ash)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin:64px 0}
.stat{display:flex;flex-direction:column;gap:8px}
.tick{width:22px;height:3px;border-radius:2px;display:block;margin-bottom:6px}
.tick-cyan{background:var(--accent)}
.tick-violet{background:var(--violet)}
.tick-teal{background:var(--teal)}
.stat strong{font-size:40px;font-weight:500;letter-spacing:-0.021em;line-height:1.1}
.stat span{font-weight:500}
.stat em{font-style:normal;font-size:14px;color:var(--ash);letter-spacing:-0.1px}

/* mosaic */
.mosaic{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.mosaic figure{margin:0;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;background:var(--card)}
.mosaic img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/2}
.m-wide{grid-column:span 2;grid-row:span 2}
.m-wide img{aspect-ratio:auto;min-height:100%}

/* ---------- agenda ---------- */
.agenda{list-style:none;margin:0;padding:0;max-width:820px}
.ag-item{display:grid;grid-template-columns:88px 1fr;gap:0 24px;position:relative;padding:0 0 4px}
.ag-time{font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:var(--ash);
  padding-top:22px;text-align:right}
.ag-body{position:relative;border-left:1px solid var(--elev);padding:18px 0 18px 28px}
.ag-item:first-child .ag-body{padding-top:20px}
.ag-dot{position:absolute;left:-4.5px;top:26px;width:8px;height:8px;border-radius:50%;
  background:var(--smoke);box-shadow:0 0 0 4px var(--canvas)}
.ag-keynote .ag-dot{background:var(--accent)}
.ag-panel .ag-dot{background:var(--violet)}
.ag-tables .ag-dot{background:var(--teal)}
.ag-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.chip{font-family:var(--font-mono);font-size:10px;letter-spacing:.09em;text-transform:uppercase;
  border:1px solid var(--border);color:var(--ash);border-radius:var(--r-md);padding:4px 7px;line-height:1}
.chip-keynote{color:var(--accent);border-color:rgba(66,164,210,.4)}
.chip-panel{color:var(--violet);border-color:rgba(143,123,248,.4)}
.chip-tables{color:var(--teal);border-color:rgba(52,181,151,.4)}
.ag-title{font-weight:500;letter-spacing:-0.2px}
.ag-detail{color:var(--ash);font-size:14px;margin-top:4px;letter-spacing:-0.1px}

/* ---------- sessions ---------- */
.sessions{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.sess{background:var(--card);border:1px solid var(--elev);border-radius:var(--r-lg);padding:24px}
.sess-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.sess-time{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}
.sess h3{font-size:20px;line-height:1.33;font-weight:500;letter-spacing:-0.021em;margin:0 0 18px}
.roster{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.roster li{font-size:14px;letter-spacing:-0.1px;line-height:1.5;
  padding-top:10px;border-top:1px solid var(--elev)}
.roster .r-name{font-weight:500;color:var(--bone)}
.roster .r-role{color:var(--ash)}
.tag-mod{font-family:var(--font-mono);font-size:9px;letter-spacing:.09em;color:var(--mist);
  border:1px solid var(--border);border-radius:var(--r-md);padding:2.5px 5px;margin-right:8px;
  position:relative;top:-1px}

/* ---------- work tables ---------- */
.wt-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;counter-reset:wt}
.wt{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:20px 0;border-top:1px solid var(--elev)}
.wt-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--teal);padding-top:2px}
.wt h3{font-size:16px;font-weight:500;letter-spacing:-0.2px;margin:0 0 6px;line-height:1.4}
.wt p{margin:0;font-size:13.5px;color:var(--ash);letter-spacing:-0.1px;line-height:1.55}
.wt .wt-inst{color:var(--mist)}

/* ---------- universities ---------- */
.uni-grid{list-style:none;margin:0;padding:8px 0 0;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:44px 36px;align-items:center}
.uni-grid li{display:flex;justify-content:center}
.uni-grid img{max-height:46px;width:auto;max-width:100%;opacity:.68;transition:opacity .22s}
.uni-grid li:hover img{opacity:1}

/* ---------- credential ---------- */
.cred-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cred-note{color:var(--mist);font-size:14px;margin:0}
.steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.step{background:var(--card);border:1px solid var(--elev);border-radius:var(--r-lg);
  padding:20px 24px;display:grid;grid-template-columns:44px 1fr;gap:16px;align-items:start}
.step-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--accent);padding-top:2px}
.step h3{font-size:16px;font-weight:500;margin:0 0 4px;letter-spacing:-0.2px}
.step p{margin:0;font-size:14px;color:var(--ash);letter-spacing:-0.1px}

/* ---------- venue ---------- */
.venue-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;margin-top:40px}
.venue-card{background:var(--card);border:1px solid var(--elev);border-radius:var(--r-lg);
  padding:32px;display:flex;flex-direction:column;align-items:flex-start;gap:24px}
.venue-addr{margin:0;font-size:20px;font-weight:500;letter-spacing:-0.021em;line-height:1.4}
.venue-facts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;
  font-size:13px;color:var(--bone)}
.venue-facts span{display:inline-block;width:110px;color:var(--mist)}
.venue-map{border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;min-height:320px}
.venue-map iframe{width:100%;height:100%;min-height:320px;border:0;display:block;
  filter:grayscale(1) invert(.92) contrast(.88) brightness(.92) hue-rotate(180deg)}

/* ---------- final cta ---------- */
.cta-band{padding:128px 0;border-top:1px solid var(--elev);text-align:center;overflow:hidden}
.cta-band::before{-webkit-mask-image:radial-gradient(ellipse 70% 90% at 50% 50%,#000 15%,transparent 75%);
  mask-image:radial-gradient(ellipse 70% 90% at 50% 50%,#000 15%,transparent 75%)}
.cta-in{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:8px}
.cta-in h2{margin:0}
.cta-note{font-size:12px;color:var(--mist);margin:0 0 24px}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--elev);padding:72px 0 40px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px}
.foot-brand{display:block}
.foot-brand .brandmark{height:30px;margin-bottom:14px}
.foot-brand .brand-name{display:block;margin-bottom:18px;font-size:14px}
.foot-brand p{margin:0 0 6px;font-size:14px;color:var(--ash)}
.foot-dim{color:var(--mist)!important}
.foot-label{font-size:11px;color:var(--bone);margin:4px 0 16px;letter-spacing:.085em}
.foot-link{display:block;font-size:14px;color:var(--bone);margin-bottom:12px;width:fit-content}
.foot-link:hover{color:var(--accent)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:64px;font-size:11px;color:var(--mist)}

/* ---------- reveal ---------- */
html.js .rv{opacity:0;transform:translateY(14px);
  transition:opacity .6s cubic-bezier(.22,.8,.3,1),transform .6s cubic-bezier(.22,.8,.3,1)}
html.js .rv.on{opacity:1;transform:none}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1020px){
  .nav-links{display:none}
  .brand-name{display:none}
  .foot-brand .brand-name{display:block}
  .menu-btn{display:flex}
  .sessions{grid-template-columns:1fr}
  .wt-grid{grid-template-columns:1fr;gap:0}
  .cred-grid{grid-template-columns:1fr;gap:40px}
}
@media (max-width:860px){
  .hero{padding:86px 0 36px;min-height:100svh;justify-content:center}
  .hero-grid{grid-template-columns:1fr;gap:22px;text-align:left;align-content:center}
  .iso-wrap{order:-1;width:min(64vw,260px,30svh);justify-self:center;margin:0 auto}
  .hero-copy h1{font-size:clamp(30px,8.6vw,36px);margin-bottom:14px}
  .hero-sub{font-size:15px;margin-bottom:22px}
  .hero-cta{margin-bottom:22px}
  .hero-meta{line-height:1.75}
  .scroll-cue{margin-top:26px}
  .section{padding:72px 0}
  .cols-2{grid-template-columns:1fr;gap:20px}
  .stats{grid-template-columns:1fr;gap:32px;margin:48px 0}
  .mosaic{grid-template-columns:1fr 1fr}
  .m-wide{grid-column:span 2;grid-row:auto}
  .m-wide img{aspect-ratio:3/2}
  .venue-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:40px}
  .cta-band{padding:88px 0}
}
@media (max-width:860px) and (max-height:820px){
  .hero{padding:76px 0 20px}
  .hero-grid{gap:14px}
  .iso-wrap{width:min(54vw,220px,24svh)}
  .hero-copy h1{font-size:clamp(26px,7.4vw,32px);margin-bottom:12px}
  .hero-sub{font-size:14px;margin-bottom:18px}
  .hero-cta{margin-bottom:18px}
  .hero-meta{font-size:11px;line-height:1.7}
  .scroll-cue{margin-top:18px}
}

@media (max-width:560px){
  :root{--pad:16px}
  .ag-item{grid-template-columns:60px 1fr;gap:0 16px}
  .ag-body{padding-left:20px}
  .ag-time{font-size:12px}
  .uni-grid{grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:32px 24px}
  .uni-grid img{max-height:36px}
  .btn{padding:11px 16px}
  .nav-cta{gap:8px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .rv{opacity:1;transform:none;transition:none}
  html.js .iso-wrap{opacity:1;animation:none}
  html.js .iso-stage{animation:none}
  html.js .lm-metal{animation:none;opacity:.5}
  .scroll-cue i{animation:none}
  
}